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This article in AJ

  1. Vol. 49 No. 3, p. 130-134
    Received: Sept 15, 1956

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The Relation between Pod Dehiscence, Relative Humidity and Moisture Equilibrium in Birdsfoot Trefoil, Lotus corniculatus1

  1. D. S. Metcalfe,
  2. I. J. Johnson and
  3. R. H. Shaw2



Birdsfoot trefoil pods of clone B74 dehisced at a relative humidity of 29.5% but not at 35%. Pods from a bulk sample of the Empire strain dehisced at a relative humidity of 40% suggesting that differences occur among lots of mature pod. There was a close interdependence of relative humidity, moisture equilibrium and pod splitting. At low relative humidity, moisture content of pods was, reduced rapidly to the point of dehiscence. Temperature, a factor in relative humidity, varied as much as 10° F. from air temperature. Increase of pod temperature in full sunlight may be enough to reduce relative humidity and pod moisture and bring about pod dehiscence.

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